package com.example.sell.controller;

import com.example.sell.enums.ResultEnum;
import com.example.sell.exception.WechatOrderException;
import lombok.extern.slf4j.Slf4j;
import me.chanjar.weixin.common.api.WxConsts;
import me.chanjar.weixin.common.error.WxErrorException;
import me.chanjar.weixin.mp.api.WxMpService;
import me.chanjar.weixin.mp.api.impl.WxMpServiceImpl;
import me.chanjar.weixin.mp.bean.result.WxMpOAuth2AccessToken;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.net.URLEncoder;

/**
 * @author: vince_zww
 * @date: 2020/8/24 13:06
 * @desceription: 微信公众号重定向
 */
@Controller
@RequestMapping("/wechat")
@Slf4j
public class WechatController {

    @Autowired
    private WxMpService wxMpService;

    @GetMapping("/authorize")
    public String authorize(@RequestParam("returnUrl") String returnUrl) {
        //1. 配置

        //2. 调用方法
        String url = "http://127.0.0.1:8080/wechatOrder/wechat/userInfo";
        String redirectUrl = wxMpService.oauth2buildAuthorizationUrl(url, WxConsts.OAuth2Scope.SNSAPI_BASE, URLEncoder.encode(returnUrl));
        log.info("[微信网页授权] 获取code，result={}", redirectUrl);

        return "redirect:"+redirectUrl;
    }

    @GetMapping("/userInfo")
    public String userIndo(@RequestParam("code") String code,
            @RequestParam("state")String returnUrl){
        WxMpOAuth2AccessToken wxMpOAuth2AccessToken = new WxMpOAuth2AccessToken();

        try {
            wxMpOAuth2AccessToken = wxMpService.oauth2getAccessToken(code);
        } catch (WxErrorException e) {
            log.error("[微信网页授权]", e);
            throw new WechatOrderException(ResultEnum.WECHAT_MP_ERROR.getCode(),e.getError().getErrorMsg());
        }
        String openId = wxMpOAuth2AccessToken.getOpenId();
        return "redirect:"+returnUrl+"?openid="+openId;
    }


}
